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-   -   sparplast 30ar (http://www.fornobravo.com/forum/f28/sparplast-30ar-7537.html)

stonylake 08-07-2009 10:58 AM

sparplast 30ar
 
Sitting around the campfire last week we decided it was time to build the pizza oven. being in the building materials business, i have little faith in the product knowledge at the big box, so i went to the local brickyard..somewhat futile. however, the is an industrial firebrick distributor close by, and they have helped several customers build ovens.
asking about fire brick, they said "why not plastic". sparplast 30ar is air set plastic refractory...basically unfired brick, either 2 or 3 inches thick. they suggested i build a mold and hammer the sparplast around it with a mallet, build it 2" thick and cover it with 2" of refractory castable, and then insulate with ceramic blanket.
has anyone done this? it seems a lot simpler than cutting and fitting 4" pieces of firebrick..

dmun 08-07-2009 02:15 PM

Re: sparplast 30ar
 
I've never heard of "sarplast". Is it firebrick clay? Would you have to fire it to firebrick temperatures?

eprante 08-07-2009 03:45 PM

Re: sparplast 30ar
 
Stony,

WHY do you want to build your oven out of plastic??? It is a brick oven, call me a traditionalist, but...
E

texassourdough 08-07-2009 04:26 PM

Re: sparplast 30ar
 
I think the fact that you can't find sparplast refractory on the web is a serious concern. I have my BS in chemical engineering and my specialty was plastics. This almost has to be some garbage byproduct that is being used as an extender to the refractory. A plastic that has the ability to withstand 1100 degrees would be rather unusual (yes there are some, but...) It is almost certain to break down and release strange molecules into the oven for some time. That said, it may be that is what it does - polymerize to give the refractory form until the fire burns it out and somehow hardens the refractory, but...

It gives me major concerns!
Jay

texassourdough 08-07-2009 04:41 PM

Re: sparplast 30ar
 
I tried a different approach and got some possibly useful info. The plastic almost certainly refers to its malleability. I found a safety sheet on a material called Super Hybond Plus that is probably the same or similar to what they recommend. Hers is the link

http://msds.anhrefractories.com/ns/S...SION_(USA).pdf

It has some bad stuff in it. When heated to oven temps it may or may not be reasonably "food grade". Requires respirators and stuff for handling.

I can't locate what the temp rating is.

I would make them give me the safety sheet and temp ratings before I went the castable rout with that stuff!

Good Luck!
Jay

MK1 08-07-2009 07:19 PM

Re: sparplast 30ar
 
Plastic refers to the materials consistency, not it's makeup. Here is an English manufacturer that lists the ingredients. REFRACTORY PLASTIC MOULDABLE - Vitcas

Mark

mfiore 08-08-2009 06:09 AM

Re: sparplast 30ar
 
Quote:

Originally Posted by stonylake (Post 61303)
so i went to the local brickyard..somewhat futile.

Lincoln Brick used to be based in Grand Rapids. I know they carry firebrick. Might want to check them out.

stonylake 08-10-2009 05:48 AM

Re: sparplast 30ar
 
Thanks Mike, i am well aware of Lincoln Brick...hired one of their drivers and bought 8 pallets of old street brick there, when with the help of Jenny, they got "blown away". i got directed to Industrial Firebrick by one of the local brick yards. i was looking for bigger bricks for the floor of the oven, they stock 2"x12"x24" firebrick, and they told me about the Sparplas refractory.

stonylake 08-10-2009 06:49 AM

Re: sparplast 30ar
 
i think MK1 is on the same track...Sparplas30AS is a mouldable refractory. go to Welcome | Spar Inc, Specialty Products and Refractories. they have all of their products on the website, and you can pull up all of the MSDS sheets. it looks like the biggest health concern is silica when tearing down old ovens. i am going to check with them re: "food grade" before i go much further... as far as temps go, it does need to be heat set to 2200 degrees F for an operating temperature over 1000degrees F

MK1 08-10-2009 11:16 AM

Re: sparplast 30ar
 
All bricks, mortar and concrete have silica. Wear a dust mask. I know I should.
The Sparplas stuff looks pretty cool. I wonder about cost and I didn't see any with calcium aluminate under 45% which is high compared to low duty firebrick which most use. I don't know if I'm recalling this correctly, but I think that puts the Sparplas into the range of medium to heavy duty firebrick which I think absorb more heat and take more fuel. I guess you could tailor the dome thickness to compensate. I'm sure someone here has a better idea of the equivalents you're considering. Interesting.

Mark


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